JPH0512618A - Magnetic head - Google Patents

Abstract

PURPOSE:To improve magnetic efficiency and to improve and stabilize magnetic head characteristics by enlarging an area to be in contact with a magnetic head core. CONSTITUTION:In order to constitute a magnetic circuit of the magnetic head core 4, insertion is made by using a back core assembly 1 on a side surface of the opposite side to a gap of the magnetic head core 4. The back core assembly 1 is constituted by bonding two back cores 2a and 2b in parallel to two rubber plates 3. Since the back core assembly is inserted by utilizing the elasticity of the rubber plates, neither distortion nor damage takes place, and variations of work and constitutive members can be absorbed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head, and more particularly to a magnetic head for a floppy disk drive.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a magnetic head of this type has a press-fitting structure in which a back spring 6 is pressed against a magnetic head core 4 by a pressing spring 5 in order to form a magnetic circuit of the magnetic head core 4. Is becoming As described above, the conventional magnetic head uses the three parts of the magnetic head core 4, the pressing spring 5, and the back core 6 to form a magnetic circuit. In addition, the back core 6 that contacts the magnetic head core 4
No. 1 had a small contact area.

[0003]

In the above-described conventional magnetic head, the back core is press-fitted between the pressing spring and the magnetic head core, which makes the work extremely difficult. It may distort and, in the worst case, damage it. In addition, the back core is structurally narrow and the contact area is small, so it is affected by work and member variations, and as a result, magnetic efficiency decreases, leading to deterioration of magnetic head characteristics such as asymmetry. was there.

[0004]

The magnetic head of the present invention comprises:
A magnetic head core having a gap for performing magnetic recording and reproduction, and a back core assembly in which two back cores are assembled in parallel with each other with at least two rubber plates with a gap corresponding to the width of the rubber plates. The back core assembly is inserted at a portion of the gap on a side surface of the magnetic head core opposite to the gap for forming a magnetic circuit.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. FIG. 1A is a perspective view, FIG. 1B is a plan view of FIG. The back core assembly in an example is shown, the figure (a) is a perspective view, the figure (b) is the top view which looked at the figure (a) from the arrow X direction.

In this embodiment, in order to form a magnetic circuit of the magnetic head core 4, the back core assembly 1 is inserted into the side surface of the magnetic head core 4 opposite to the gap. The back core assembly 1 has two rubber plates 3 and two back cores 2a and 2b bonded in parallel to each other.

In this embodiment, when the back core assembly 1 is inserted into the magnetic head core 4, the elastic rubber plate 3 can be stretched in the direction of arrow F in FIG. , 2b is widened and can be easily inserted. Therefore, the magnetic head core 4 and the back core 2
There is no distortion or damage to a and 2b. After the back core assembly 1 is inserted, the load due to the contracting force of the rubber plate 3 is reduced as shown in FIG.
Since it is applied in the direction of arrow P in (b), the magnetic head core 4 and the back cores 2a and 2b are in stable contact with each other. The back core assembly 1 includes two back cores 2a and 2a.
Since b is used, a sufficient contact area can be obtained.
Therefore, the effects of work and material variations can be ignored,
Further, since the contact area is increased, the magnetic efficiency is improved, and the characteristics of the magnetic head are improved and stabilized.

[0009]

As described above, according to the present invention, by using the back core assembly in which the two back cores are adhered in parallel to the rubber plate, the back core is no longer press-fitted, so that the magnetic head and the back core are distorted. It is possible to absorb work and member variations. Also,
By using two back cores, a sufficient contact area for forming a magnetic circuit can be secured, so that magnetic efficiency is improved and characteristics of the magnetic head are improved and stabilized.

[Brief description of drawings]

1A and 1B show an embodiment of the present invention, FIG. 1A is a perspective view, and FIG. 1B is a plan view of FIG. 1A viewed from an arrow Y direction.

2A and 2B show a back core assembly in the present embodiment, FIG. 2A is a perspective view, and FIG. 2B is a plan view of FIG.

3A and 3B show an example of a conventional magnetic head, FIG. 3A is a perspective view, and FIG. 3B is a plan view of FIG. 3A viewed from the arrow Z direction.

[Explanation of symbols]

 1 Back Core Assembly 2a, 2b Back Core 3 Rubber Plate 4 Magnetic Head Core 5 Holding Spring 6 Back Core 7a, 7b Coil

Claims (1)

Claim: What is claimed is: 1. A magnetic head core having a gap for performing magnetic recording and reproduction, and two back cores with at least two rubber plates interposed between them to maintain a distance corresponding to the width of the rubber plates. And a back core assembly assembled in parallel with each other, wherein the back core assembly is inserted at a portion of the gap on a side surface of the magnetic head core opposite to the gap for forming a magnetic circuit. Magnetic head.